diff --git a/js/app/models/InteractiveNode.js b/js/app/models/InteractiveNode.js
index 7e4ecba..51be87d 100644
--- a/js/app/models/InteractiveNode.js
+++ b/js/app/models/InteractiveNode.js
@@ -475,6 +475,18 @@ Ext.define('amdaModel.InteractiveNode', {
 					case 'amdaModel.AliasNode'        :                        
 						paramName = "#"+node.get('text');
 						break;
+                                                                                                    case 'amdaModel.DerivedParamComponentNode' : 
+                                                                                                    paramId = node.get('text');
+                                                                                                    var parentId = paramId.substr(0, paramId.length - 3);
+                                                                                                    paramName= "ws_" + parentId;
+                                                                                                    var regExp = /\(([\d]+)\)/;
+                                                                                                     var component_index = regExp.exec(paramId);
+                                                                                                      if (component_index)
+                                                                                                      {
+                                                                                                        components = [];
+                                                                                                        components['index1'] = component_index[1];
+                                                                                                        }
+                                                                                                    break;
 					case 'amdaModel.DerivedParamNode' :                         
 						paramName = "ws_"+node.get('text');
 						break;
diff --git a/js/app/views/DownloadUI.js b/js/app/views/DownloadUI.js
index 8b9bec4..d724806 100644
--- a/js/app/views/DownloadUI.js
+++ b/js/app/views/DownloadUI.js
@@ -131,12 +131,14 @@ Ext.define('amdaUI.DownloadUI', {
     {
         var arrayRec = new Array();
         var index = 1;
+
         if (arrayParams)
         {
-            index = 0;
             Ext.Array.each(arrayParams, function (item) {
                 if (Ext.isObject(item)) {
-                    if (typeof paramId !== 'undefined')
+             // handel case of derived parameters 
+                   var patt = new RegExp("ws_");
+                    if (typeof paramId !== 'undefined' && ! patt.test(item.paramid))
                     {
                         // for Parameter Name in Download Module
                         var paramObj = {
diff --git a/js/app/views/ParameterUI.js b/js/app/views/ParameterUI.js
index dae152b..0525614 100755
--- a/js/app/views/ParameterUI.js
+++ b/js/app/views/ParameterUI.js
@@ -152,16 +152,18 @@ Ext.define('amdaUI.ParameterUI',
                         buildchain:this.object.get('buildchain'),
                         timestep:this.object.get('timestep')
                 };
+                 loadMask.show();
                 AmdaAction.generateParamInfo(obj, function (result, e) {
 	 if (!result || !result.success)
                         {
+                            loadMask.hide();
                                 if (result.message)
                                         myDesktopApp.warningMsg(result.message);
                                 else
                                         myDesktopApp.warningMsg('Unknown error during parameter compilation');
                                 return;
                         }
-		
+	loadMask.hide();	
                     paramModule.linkedNode.get('object').set('dim_1', parseInt(result.dimensions.dim_1));
                     paramModule.linkedNode.get('object').set('dim_2', parseInt(result.dimensions.dim_2));  
                     if (onSuccess)
@@ -206,24 +208,20 @@ Ext.define('amdaUI.ParameterUI',
 					this.object = paramobj;
 					if (toRename) paramModule.linkedNode.toRename = true;
 				} 
-                                                                                loadMask.show();
 				this.generateParamInfo(function () {
                                                                                     paramModule.linkedNode.set('isParameter', true); 
                                                                                     paramModule.linkedNode.create({scope : this, callback : function() {
-                                                                                            loadMask.hide();
                                                                                     }});
                                                                                 });   
 			} else 
 			{            
 				paramModule.linkedNode.set('contextNode',paramModule.contextNode); 
-                                                                                loadMask.show();
                                                                                 this.generateParamInfo(function () {
                                                                                     paramModule.linkedNode.update({scope : this, callback : function() {
-                                                                                            loadMask.hide();
                                                                                     }});
                                                                                 });   
 			}
-		}        
+		}   
 	},
 
 	/**
diff --git a/js/app/views/PlotComponents/PlotTree.js b/js/app/views/PlotComponents/PlotTree.js
index c4df699..ed85cb5 100644
--- a/js/app/views/PlotComponents/PlotTree.js
+++ b/js/app/views/PlotComponents/PlotTree.js
@@ -694,7 +694,19 @@ Ext.define('amdaPlotComp.PlotTree', {
                                                                             if (!record.get('isParameter'))
                                             return false;
                                         //targetNode, position, paramId, paramComponents, isVector, plotOnly
-                                        this.dropParamToCreate(targetNode, position, "ws_" + record.get('text'));
+                                        var components = null;
+                                        var dim1=record.get("dim_1");
+                                        var dim2=record.get("dim_2");
+                                        if(dim1>3 && dim2==1)
+                                        {
+                                            components = [];
+                                            components['index2'] ="0"
+                                        }else if(dim1==1 && dim2>1)
+                                        {
+                                            components = [];
+                                            components['index1'] ="0"
+                                        }
+                                        this.dropParamToCreate(targetNode, position, "ws_" + record.get('text'),components);
                                         return true;
                                     case 'amdaModel.DerivedParamComponentNode':
                                         if (!record.get('isParameter'))
@@ -776,7 +788,6 @@ Ext.define('amdaPlotComp.PlotTree', {
                 if (dataLength > 1)
                 	return false;
                 var draggedRecord = draggedRecords[0];
-                console.log(me.isValidToDrop(draggedRecord,targetNode,position));
                 return me.isValidToDrop(draggedRecord,targetNode,position);
             },
             onPlotContainerDrop : function(dd, e, data){
diff --git a/js/app/views/PlotUI.js b/js/app/views/PlotUI.js
index b6ad001..e604eae 100644
--- a/js/app/views/PlotUI.js
+++ b/js/app/views/PlotUI.js
@@ -102,8 +102,9 @@ Ext.define('amdaUI.PlotUI', {
 		if (this.object.get('last-plotted-tab') == 0) {
 			this.object.set('last-plotted-tab', this.plotTabs.getSelectedTabId());
 		}
-		var downObject = amdaModel.DownloadNode.decodeObject(this.object);		
-		amdaModel.DownloadNode.set('object',Ext.create('amdaModel.Download',downObject));		 
+		var downObject = amdaModel.DownloadNode.decodeObject(this.object);
+		amdaModel.DownloadNode.set('object',Ext.create('amdaModel.Download',downObject));
+               
 		amdaModel.DownloadNode.editInModule(); 
 	},
     
--
libgit2 0.21.2